US2601723A

US2601723A - Scraper employing razor blade

Info

Publication number: US2601723A
Application number: US791841A
Authority: US
Inventors: Keller Thomas
Original assignee: CEDARBERG Manufacturing Co Inc
Current assignee: CEDARBERG Manufacturing Co Inc
Priority date: 1947-12-15
Filing date: 1947-12-15
Publication date: 1952-07-01
Anticipated expiration: 1969-07-01

Description

July 1, 1952 T. KELLER 2,601,723

SCRAPER EMPLOYING RAZOR BLADE Filed Dec. 15, 1947 INVE NTOR '771,o11zas Ke /le r- ATTORNEYS Patented July 1, 1952 UNITED STATES PATENT-OFFICE- soRAPER EMPLoYINe Razon. BLADE Thomas Keller, Minneapolis, Minn., assignor to Cedarberg Manufacturing Company Inc., Minneapolis, Minn., a corporation of Minnesota Application December 15, 1947, Serial No. 791,841

(Cl. SII-162) 3 Claims. 1

My invention relates to improvements in scrapers of the type adapted to be held in and operated by one hand of the user, as for scraping frost, sleet, snow, paint, sticker-signs and the like from window panes or other surfaces. I

An' object of the invention is to provide a relatively inexpensive and compact article of the instant nature having a minimum number of parts designed andcooperating to provide a troublefree device that is eiiicient, safe and easily operated by any novice in performance of the operations above noted, or in the cutting and `slitting of various materials.

More specifically, it is an object of my invention to provide a scraper, employing a blade, such as theconventional safety razor blade, and including a handleand a slide releasably gripping the blade and movably guided by the handle to project and expose the blade forwardly of said handle and to retract and sheath said blade within the handle in a position guarded thereby.

`Another object of the'invention is to provide 'a handle and slide, as above indicated, wherein said handle and slide cooperate to hold a. second or reserve blade in shielded position of non-use pending the need therefor in replacement of the working blade.

Other objects of the invention reside in the novel combination and arrangement of parts and in thedetails of construction hereinafter illustrated and/ or described. Y

In the drawing, Fig. l is a plan view of an embodiment of my invention, said view showing the slide in retracted position within the handle of "the" device; Fig. 2 is a longitudinal sectional view taken as on the line 2--2 of Fig. 1; Fig. 3 is an elevational view of the structure shown in Figs. 1 and 2, portions of the parts being broken away and the slide being shown projected to'present the blade in working position relative to the handle; Fig. 4 is a view similar to Fig. 2 showing the bowed slide flattened, as under the pressure of a users thumb, to free the latch member of the slide from the abutment stops on the handle; Fig- 5 is a detail perspective view of the handle of the illustrated scraper; Fig. 6 is a detail perspective view of the slide; Fig. 7 is a fragmentary view showing the underside of the slide at the forward end thereof and illustrating particularly the lower blade-holding jaw of said slide, and Fig. 8 is a fragmentary view showing the underside of the slide at the rear end` thereof and illustrating particularly a reserve blade and the blade-holding means on said slide forV said reserve blade.

Referring to the drawings, it will be seen that the illl'ustrated embodiment of my invention includes a handle A and a slide B, both being formed of sheet material.

The handle A is of channel-like construction open at its forward end and closed at the rear end thereof,V said handle consisting of an elongated back I0, upturned webs` I I, I I extending along the sides of said back I0, and flanges I2, I2 turned inwardly from said webs II, Il. Closing the rear end 'of said handle A, the'web I I and flange I2 at one side of the handle merge along curved lines with the web I I and flange I2 at the other side' of said handle, such merger of webs and flanges providing a rounded rear end :for the handle A which renders the same comfortable to the hand of the user. Near its rear end and intermediately of the webs II, I I, the back I0 of the handle A is formed with a short slot I3 extending transversely thereof. The rear wall of the slot I3 provides a forwardly facing abutment 'I4 `and the forward Wall of said slot I3 provides a rearwardly facing abutment I5. Forwardly of 'said slot I3,` the back I0 of the handle A is indented from beneath to form -a hump I B and thereby elevate above the upper surfaceof the back I0 a portion of the rearwardly facing abutment wall I5 of said slot I3. I

`The slide B includes an elongated body I'I of resilient material upwardly bowed longitudinally thereof, the forward portion of said body I'I being formed with a downwardly opening socket I8 extending transversely across the same near the front edge thereof and further formed with reinforcing beads IQ extending rearwardly from said socket I8 along the edges of said body, said forward portion of the body I1 thus formed constituting an upper jaw c. Said slide B further includes a lower jaw d of sheet material which generally matches said upper jaw c, said lower jaw d being secured along its rear margin to the underside of the body I 'I transversely thereof. This lower jaw d is` formed near its forward lend with an upwardly opening socket 20 extending thereacross and `mating with the socket I 8 in the upper jaw c. Said lower jaw d is formed with reinforcing beads extending rearwardly from said socket 20, beads 2 I, 2I being formed along the edges of said lower jaw d longitudinally of the body I1 and bead 22 being formed between said beads 2l, 2| and likewise extending longitudinally of said body I'I. An ear 23 upwardly turned from the lower jaw d provides a stop rat one end of the socket 20 in said jaw. At the rear of the slide B the body I'I thereof is provided with an extension 24 at the terminus of which is downturned lug 25. Said extension 24 and lug 25 constitute a latching member for the slide which cooperates with the abutment walls I4, I5 of the slotl I3 in the back I0 of the handle A, as will later appear.

The jaws c, d constructed, as above noted, accommodate the well known form of expendable blade commonlyl used in safety razors, such a blade as at 2G having a sharpened' forward edge 21 and a reinforcing rib 2S extending along the rear edge thereof. A blade 26 of said nature is slipped endwise between the jaws c, d from one side of the slide B, the upper and lower portions of the rib 28 taking position respectively in the sockets I8, 20 of said upper and lower jaws c, d, and the blade proper in advance of the rib 28, but to the rear of the sharpened edge- 21, taking position between

blade gripping lips

29, 29 of said jaws, which lips comprise the marginal portions of the jaws forwardly of said sockets I8, 20. The length of the blade 2,6, corresponds substantially withV the width of the slide B, said blade 2'6 upon its insertion between the jaws c, d being pushed therealong until the leading end of the blader engages the. stop-forming ear 23. From the.r foregoing, it willl be appreciated that the sockets I8, 2U in the jaws c, d which receive the ribbededge of the blade 2G deprive said blade of movement, relative to the slide B longitudinally thereof, and that said ear 2-3 on the lower jaw d deprives said blade 26 of movement relative to thefslide B. laterally thereof in one direction.

`Toassemble the slide B with the handle A, the former is simplyl inserted rear end foremost into the latter,V the body I'I` of the upwardly bowed slide being therewith flexed slightly to atten the samej.: Thusppositioning the slide B within the handle A, 'the rear end of the body I'I of said slide serves asV a bearing as at 30, which yieldingly ridesv along the back Il]1 offsaid handle, while the lower` jaw d serves asa shoe likewise to-ride along said back I0'. Oppositely, the marginal upper portionsof the bowed body II at the crest thereof yieldingly bear'against and ride along the lower Surfaces ofthe flanges I2, I2 of said handle A. Approximately centrally of theV body I'I, an upstanding bulge 3'I is provided to serve as thumbrest. Grasping the device in theV fingers of his hand, a user will apply his thumb to said'V thumbrest 3ft and by convenient manipulation of the slideB may propel and repel the same relative tothe handle A to project the blade 26 into an exposed. position for use as for scraping or cutting (Fig. 3,) and to retract said blade into position of disuse sheathedv within the handle A (Fig. 2). j

When' the slide B is repelled, the extension 24 thereon will strike the web II of the handle A atthe: rear thereof and limit the retraction. of the blade 26- which takesy its sheathed position Within` saidhandle A. In this sheathed position of the blade 2,6, it is to be noted that the sharpened edge 2,1, thereof is held by the jaws c, d flatly against the upper surface of the back Ii) of the handle A. InV this disposition of the edge 2'I relative 'to the back I0, said edge is effectively guarded. WhenV the slideB- is propelled to ad- Vance the blade'26 into workingposition (Fig. 3), the-latch lug` 25v is sprung into the slot I3 by thev flexed resilient extension 24 and engages the rearwardly facing abutment wall I5 of said slotthus arresting the forward movement of the slideB and establishing theblade 26v in its positionlof use. In this connection, it is to be noted that; the raising of a. portion of the abutment walll I5I above the upper surface-of the back Ill of the handle A insures the catching of said wall I5 by the latch lug 2'5 upon a forward thrust of the slide B` to present the blade 26 in working position. With the latch lug 25 positioned within the slot I3, said latch lug engages the forwardly facing abutment wall I4, thereby preventing retrograde movement of the slide B in the handle A as the blade 2B is used in scraping or cutting operations. To enable the slide B to be moved back from its operative position (Fig. 3) to its inoperative position (Fig. 2), the user simply presses downv on the thumb-rest 3| on the body I'I of the slide to unlatch the slide from the back I0 of the handle A and thereupon retracts thel then free slide. Such downward unlatching pressure brought'to bear on the body II of the slide A biases the extension 24 upwardly with thel result that the latch lug 24 is withdrawn from the slot I3 in the handle.

The slide B is provided with an extra or reserve blade 32 to replace' the blade Worn. out inv the jaws c, d.v To this end, oppositely directed bladeholding fingers 33 are struck down out of the bowed body I'I' of said slide. Thesex fingers 3'3 receive and carry the extra blade 32' crosswise beneath said body I'I and deprive said blade of lateral movement relative to saidk body longitudinally thereof, longitudinall movementof said blade relative to said body If'I4 laterally thereof being permitted by the-fingers 33 to admit of the endwise application of the extra blade 32 to said slide B and the endwise removal of said extra blade from the slide. With thevv slide B in place within the handle A, the Webs II, II of said handle actl to hold the" extra blade 32 against endwise dislodgement from the blade-holding fingers 33' on the slide. And, too, the one of said webs II opposite the ear 23 on jaw d acts to hold the working blade 26 against endwise dislodgement from the jaws c, d. To render the extra blade accessible, the slide B- is slid from the handleA and this is accomplished by rstbringing thumb pressure to bear upon the body II of said slidev (Fig. 4)-, whereby thel latch lug 25 is elevated above the raised portion of the rearwardly facing. abutment walli I5 of thev slot I3 in said handle. Having removed the'slideB from the handle A, the user may slip the extra blade 32. out` of the grasp of they blade-holding fingers 3i"r and use-itin replacement ofthe working blade 26 previously held in the jaws c, d.

From the foregoing, it will be apparent that I have devised an exceedingly simple, compact, durableand inexpensive device in= which the slide B is readily propelled and repelled along theY handle A by' the thumb ofV the users hand in which the device is held, the stopping and latching of the slide B being effected automatically, and the unlatching of theA slide being effected under pressure of the thumb brought against the bodyY I'I of the slide without chang-ing the position of the thumb as usedl in shifting the slide B forwardly andv backwardly in the handle A.

Changes in the specific formr of my invention, as herein described; may beI made within the scope; of what is claimed` without departing from thespirit of my invention.

Having. described my invention, what I claim as new and desire to protect by Letters Patent is:

1l. In a scraper, a channel-like handle open at its forward. end and comprising an elongated planiform' back, ar web member upstanding from said back along either Side thereof, and a flangev member' extending inwardly fromeach of the web members, said web members and fiangemembers slide carried by the handle and including an elongated upwardly bowed body of resilient sheet material, a blade mounted on the body at the forward end thereof, said slide slidably bearing at the front and rear of said body against the back of the handle, said body intermediately marginally thereof slidably bearing against the flanges of said handle, said slide being adapted to be propelled and repelled relative to the handle and flexed to flatten the bowed body thereof by the thumb of a users hand grasping said handle, said slide further including a latch member consisting of a rearward extension of said body and a latch lug depending from said extension, said back of said handle being formed with a forwardly facing abutment and a rearwardly facing abutment, the latch lug of said latch member being adapted normally to engage said rearwardly facing abutment upon the forward propulsion of the slide to limit its forward movement in projection of the blade into working position and adapted normally to engage said forwardly facing abutment to prevent the slide from having retrograde movement retracting said blade from said Working position thereof, the attening of the bowed body of said slide acting to bias said latch member upwardly relative to the back of said handle sufficiently to swing said latch lug clear of said forwardly facing abutment and thus free the slide for retraction into said handle.

2. In a scraper, a channel-like handle open at its forward end and comprising an elongated planiform back, a web member upstanding from said back along either side thereof, and a flange member extending inwardly from each of the web members, a slide carried by the handle and including an elongated upwardly bowed body of resilient sheet material, upper and lower jaws at the forward end of said body, a blade, said blade being clamped at its rear portion between said jaws and having a sharpened front edge exposed forwardly of the jaws, said slide slidably bearing at the front and rear of said body against the back of the handle, said body intermediately marginally thereof slidably bearing against the flanges of the handle, said slide being adapted to be propelled and repelled relative to the handle and flexed to flatten the bowed body thereof by the thumb of a users hand grasping said handle, said slide further including a latch member consisting of a rearward extension of said body and a latch lug depending from said extension, said back of said handle being formed with a slot therein providing a forwardly facing abutment and rearwardly facing abutment, the latch lug of said latch member being adapted normally to engage said rearwardly facing abutment upon the forward propulsion of the slide to limit its forward movement in projection of the blade into working position and adapted normally to engage said forwardly facing abutment to prevent the slide from having retrograde movement retracting said blade from said working position thereof, the flattening of the bowed body of said slide acting to bias said latch member upwardly relative to the back of said handle sufliciently to swing said latch lug clear of said abutments and thus free the slide for forward and backward movement along said handle.

3. In a scraper, a channel-like handle open at its forward end and comprising an elongated planiform back, a web member upstanding from said back along either side thereof, and a flange member extending inwardly from each of the web members, a slide carried by the handle and including an elongated upwardly bowed body of resilient sheet material. the forward portion of said body constituting an upper jaw, a lower jaw secured to said body, a blade, said blade having a rear portion adapted to be received between said jaws and having a sharpened front edge adapted to be exposed forwardly of the jaws, said jaws being adapted to prevent said blade from having movement relative to the slide in a direction longitudinally thereof, the rear portion of said body constituting a rear bearing for the slide, said lower jaw providing a front bearing for said slide, said bearings slidably bearing against the back of said handle, and the body of the slide intermediately marginally thereof slidably bearing against the fianges of the handle, said slide being adapted to be propelled and repelled relative to the handle and flexed to flatten the bowed body thereof by the thumb of a users hand grasping said handle, said slide further including a latch member wholly contained within the handle, said latch member consisting of a rearward extension of said body and a latch lug depending from said extension, said back of said handle being formed with a' forwardly facing abutment, the latch lug of said latch member being adapted to engage said forwardly facing abutment to prevent the slide from Shaving retrograde movement retracting said blade from projected working position, the nattening of the bowed body of said slide to swing said latch lug clear of said abutment and free the slide acting to bias said latch member upwardly relative to the handle sufficiently for the aforesaid retrograde movement thereof.

THOMAS KELLER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,291,514 Warner et al. July 2B, 1942 2,404,141 Nelson July 16, 1946